Our culture is rooted in a shared vision — to help keep the world’s most precious resource safe — and in the core values that guide us in pursuing this vision and delivering on our mission to clients.
We provide the highest quality liquid storage design and construction services at the best long-term value with an unrivaled customer experience. We have built over 3,500 pre-stressed concrete liquid storage tanks over the past 90 years around the country and world, as a result we have become the leader in the industry when it comes to quality and innovation.

DN helps keep the world’s most precious resource safe by designing and constructing prestressed concrete liquid storage tanks. Our mission is to provide our clients around the world with the highest quality design and construction services across all of water, at the best overall value, with an unrivaled customer experience. To do this, we form strong, collaborative relationships that ensure exceptional outcomes. The results are long-term performance, durability, reliability, minimal maintenance requirements, and lowest cost of ownership. With over 90 years of experience, and a deep commitment to helping clients meet the emerging needs of today and tomorrow, DN is Built for the Future.
DN has 10 regional offices and 3 operations facilities located in Greater Boston, Dallas and San Diego areas.